{X+Y+Z=20
{2X+Y+ 1.5Z=36
{ 2X * 500+Y * 700+ 1.5Z * 400 = 18300
Solution:
{X= 15
{Y=3
{Z=2
A: Car A 15, car B 3 and car C 2.
A. Self-study courses for marketing majors
Self-taught marketing college exam subjects:
Introduction to marketing:
This major trains sen